Word.ws English Dictionary

umbra

Syllables: um·bra/ˈʌmbɹə/

umbra noun: the fully shaded inner region of a shadow cast by an opaque object.

umbra: the fully shaded inner region of a shadow cast by an opaque object
Image: Qarnos, Public domain, via Wikimedia Commons

Noun

umbra (plural umbras or umbrae or (obsolete) umbræ)

  1. The fully shaded inner region of a shadow cast by an opaque object.
    1. The area on the earth or moon experiencing the total phase of an eclipse.
  2. The central region of a sunspot.
  3. (literary) A shadow.
  4. (archaic) An uninvited guest brought along by one who was invited.
  5. One of the family Umbridae of mudminnows.
  6. One of genus Umbrina of drums (family Sciaenidae).
  7. An element of the umbral calculus.
    • In order to set up such an algorithm, we need the notion of multiplicative inverse of an umbra. Two umbrae are said to be multiplicative inverse to each other when αγ ≡ u.2009, Ernesto Damiani, Ottavio D'Antona, Vincenzo Marra, From Combinatorics to Philosophy: The Legacy of G.-C. Rota, (page 113)#

umbra meaning in Tamil and Urdu

umbra in Tamil

நிழல், கருநிழல், எப்போதும் உடன்வருவது அல்லது உடனிருப்பது, நீங்காதது

umbra in Urdu

چھاؤں, چھایا, سایہ

Forms of umbra

pluralumbras
pluralumbrae
plural (obsolete)umbræ

Origin of umbra

Borrowed from Latin umbra (“shadow”). Doublet of umber.

Words formed from umbra

Questions about umbra

What does umbra mean?
Umbra means the fully shaded inner region of a shadow cast by an opaque object.
What is umbra in Tamil?
Umbra in Tamil is நிழல், கருநிழல், எப்போதும் உடன்வருவது அல்லது உடனிருப்பது. See Umbra meaning in Tamil.
What part of speech is umbra?
Umbra is a noun.
How do you pronounce umbra?
Umbra is pronounced /ˈʌmbɹə/.
What is the plural of umbra?
The plural of umbra is umbras.

Words near umbra in the dictionary

  1. umbonulomorph
  2. umbonulomorphs
  3. umbos
  4. umboth
  5. umbozerite
  6. umbra
  7. umbra recta
  8. umbra versa
  9. umbracious
  10. umbracula
  11. umbracular

Source and license

Adapted from Wiktionary: umbra (page history and authors); umbra (Tamil Wiktionary) (page history and authors); umbra (Urdu Wiktionary) (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

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Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Vealhurl-umbra.wav.

Cite this entry: “umbra.” Word.ws, https://word.ws/umbra. Based on Wiktionary, CC BY-SA 4.0.